Preheat the oven to 375F. Bake the pie crust for 15 minutes, or until golden brown. Allow the crust to cool.
If using fresh spinach, sauté the spinach with 1 tbsp of olive oil. If using frozen spinach, heat the spinach according to package instructions.
In a separate bowl, whisk the eggs. Add the half-and-half, and mix until incorporated.
If using canned diced tomatoes, drain the juice from the tomatoes before adding the tomatoes to the egg and cream mixture. Mix in the herbes de provence, parsley, garlic, salt, pepper, and spinach.
Pour the mixture into the cooled pie crust. Bake at 375F for 35 minutes, or until the quiche has set.